Best roof stackup for Houston, TX
This is on an original single story ranch style house with no way to ins under the deck.
here is the proposed stackup.
2×6 rafters, original 1950s 1×6 plank deck, either vap open or vap closed peal and stick, one 3″ and one 2″ layer foil faced ISO, top layer taped with a tape that can accommodate ISO shrinkage (suggestions ?), 1.5″ vent channel,
Standing seam metal (Kynar high SRI on top and bare galvalum on bottom .06 emissivity).
The big question is vapor open or vapor closed peal and stick and what to do to limit any odor wafting through the ship lap plank decking
also am having trouble deciding on vapor open or closed peal and stick on walls with 3″ foil ISO plu rainscreen under ship-lap siding
any rec commendations for a drain plane behind the ISO and plywood sheathing or is that a waste of time
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